There is nothing worse than getting nothing in return after managing to travel back in time by committing all manner of sins to break through the boundaries of heavenly destiny—Kael is still trying.

He tried all sorts of ways to tell his past self what would happen.

He wrote everything down in a book, but his writing vanished afterward. He recorded it with a makeshift camera, but the recordings always failed. He even went to Valerius Castle to search for something that might never disappear.

Like the castle walls, which remained completely unchanged even in the future.

But once again, he failed. Everything he’d used to try to inform his...